# Equation + exponential function - math problems

#### Number of problems found: 32

• Exponential equation
In the set R solve the equation: ?
• Exponential equation
Find x, if 625 ^ x = 5 The equation is exponential because the unknown is in the exponential power of 625
• Exponential equation
Solve for x: (4^x):0,5=2/64.
• Exponential equation
Determine the value of having y in the expression (3^y): (4^-1)=36. Unknown y is a natural number greater than zero.
• Coordinate
Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5x
• Log
if ?, what is b?
• Sequence
Calculate what member of the sequence specified by ? has value 86.
• Interest
What is the annual interest rate on your account if we put 32790 and after 176 days received 33939.2?
• Car value
The car loses value 15% every year. Determine a time (in years) when the price will be halved.
A radioactive material loses 10% of its mass each year. What proportion will be left there after n=6 years?
• Geometric progression
In geometric progression, a1 = 7, q = 5. Find the condition for n to sum first n members is: sn≤217.
• Demographics
The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase of population?
• Decibel
By what percentage does the sound intensity increase if the sound intensity level increases by 1 dB?
• Investment
1000\$ is invested at 10% compound interest. What factor is the capital multiplied by each year? How much will be there after n=12 years?
• The city 3
The city has 22,000 residents. How long it is expected to have 25,000 residents if the average annual population growth is 1.4%?
• Half life
Determine the half life of bismuth, when bismuth weight from the original weight of 32 g was only 2 grams in 242 minutes.
• If you 4
If you deposit \$2500 in an account paying 11% annual interest compounded quarterly, how long until there is the \$4500 in the account?
• If you 2
If you deposit \$4000 into an account paying 9% annual interest compounded monthly, how long until there is \$10000 in the account?
• Semiannually compound interest
If you deposit \$5000 into an account paying 8.25% annual interest compounded semiannually, how long until there is \$9350 in the account?
• Exponential warm
Suppose that a body with temperature T1 is placed in surroundings with temperature T0 different from that of T1. The body will either cool or warm to temperature T(t) after time t, in minutes, where T(t)=T0 + (T1-T0)e^(-kt) . If jello salad with 30 degree

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